After two years’ research, we now have a ________ better understanding of the disease.
Tim Bemers-Lee is generally considered ______ the World Wide Web, on which all the information is shared by all.
I won’t have you ______ up and down all day.
Every minute is made good ______ of ______ for the coming national examinations.
The question that puzzled us is _____ we can get rid of the air pollution in the area.
Sam got wounded in the Vietnam War and he still has a hole ______ in his leg.